There are two things you can try. The first thing I would do is a join face command to make it circle with one face. Then you can use resize face to change the diameter.
If that does not work you can try offset region since you have 4 faces, that command does have the ability to give you the desired output.
If it is an unparametrize body, first try the optimeze faces command in synchronous modeling.
Move Face is utilized more for translating/rotating features. I cannot use offset face for this. Below are some examples.