I somehow deleted all my apps on my TI-84 Plus Silver Edition how do i get those apps back?

The apps that came preloaded can be download from the Texas Instruments site education.ti.com. Use Ti connect to transfer the apps from the computer to the calculator.
As to your programs (the ones you might have typed in) you will have to type them again.

When either of them is loaded in memory once, it remains there and takes over the graphing features of the calculator. If one is loaded in memory it must first be unloaded before you can use the other.
To recover the normal calculator behavior both must be unloaded from RAM. Overwrite one by the other, and uninstall the other. That will not delete them.

Press the [APPS] button. Use arrow to scroll down along the list of apps. Look for apps that have names of languages (Francais, Espanol, Deutch, Dansk, Italiano, Norsk, any european language whose name you can recognize). Once you find the name of a language, highlight it and press ENTER. In the screen that is displayed inviting you to select a language, press 2:English. and press ENTER. The calculator localization should change to the default English language.
To avoid having to do that again, and to save memory spsce, delete the language apps you do not need. delete also the applications that are in those languages (periodic table, Cell Sheets, Science Tools, etc.

Press the APPS key, then select any of the language apps (Deutsch, Espanol, Francais, etc.) and press ENTER. Select English from the menu and press any key when prompted to do so.

Hello,
Press the [APPS] button. Scroll down till you reach Spanish or Espanol. Select the app and press [ENTER]. You are given the choice of setting 1.Spanish or
2. English.
Press 2 then [Enter].
Hope it helps.

Hello,
Press [2nd][MEM][7:Reset][1:All RAM][2:Reset][ENTER].
Resetting RAM will clear old data stored in list, matrices, graphs, stat graphs.
If you have precious data, you may choose to
press [2nd][MEM][1:ALL] then you scroll down the list and erase individual items. When the Fat Right Arrow points to an item, you press [DEL] to delete it. Be careful not to delete the APPS (have asterisks to show they are archived).
Hope it helps.

From the TI knowledge base and FAQ

How do I correct ERR: MEMORY on a TI-83 family or TI-84 Plus family graphing calculator?

An ERR: MEMORY is given when there is not enough memory to perform the instruction or function. To increase available memory by deleting the contents of any variable (real or complex number, list, matrix, Y= variable, program, Apps, AppVars, picture, graph database, or string), follow these steps. • Press [2nd] [MEM] to display the MEMORY menu.
• Press 2: Mem Mgmt/Del.
• Select a variable or data that needs to be deleted and press [ENTER].
• Use the arrow keys to move the cursor next to the item, and then press [DEL]. The variable or data should now be deleted from the memory.
When deleting programs or Apps, a message asking for confirmation will appear. Select 2:Yes to continue. To leave any variable screen without deleting anything, press [2nd] [MODE].
Notes:
With the exemption of programs and Apps, no warning will be given to verify the deletion.Some system variables, such as the last-answer variable Ans and the statistical variable RegEQ, cannot be deleted.

Hope it helps.

If your calculator is registered on the TI site, you can go to the site and probably download them using your cable.

Check the following:

TI-84 Plus TI-84 Plus Silver Edition Guidebook

TI-84 Plus TI-84 Plus Silver Edition Guidebook

Introduction tothe TI-83 Plus and TI-84 Plus



A collection of activities for the TI-83 and TI-84 Plus


Part II: Texas Instruments TI-83, TI-83 Plus, TI-84 Plus Graphics

You actually don't need to restore factory settings for this. I did it accidently and fixed it quickly.

Go to Stat > Edit...

Scroll over until at the bottom of the screen it asks for a name. Press 2nd > 1. L1 should appear, so now, just press enter.

Or just go to Stat > SetUpEditor...