How do I move this selected faces up along the Z axis and snap it to the unselected faces? They were originally connected together, but I cut them out initially thinking I didn't need them. The vertices that are supposed to be connected together are on the same Z axis. I tried different settings in snapping but the selected faces seem to just jump all over the place. I need to keep the sizes of the selected faces the same, so I can't just select vertices and snap them up. I need to move everything up together.
Thank you.