It seems the conversation is going all over the place...
If I am correct this is what you want;
Go to your table where the numbers are being put in,
Choose a cell in that field,
Click on Design view,
Change the data type to short text,
On the "Format" row below, type &°
And save your changes...
In order to make that symbol in Access, ( or Excel );
Hold the Alt key down just like when you use the control key, and type: 242424 on the keypad to the right, not above.
And then let go of the Alt key at the end.
So: Alt + 242424 will give you °