When I use the push pull tool I see the offset in the “Dimensions” bar. When I move the face up (which should be positive) I see a negative number. If I get the face offset to around where I want it and then manually type in the exact value it ends up offset the opposite direction. This is either a bug or incredibly misleading UI. It looks like the dynamic part of the “Dimensions” field is backwards because the coordinate system uses +Y as up.