The only way, actually two ways, involve unsetting the pad’s own Locked property. Then it’s possible to change the coordinates of the pad directly, or to use Special Tools → Move Exactly
The third way is to:
- check option “Allow free Pads” in general Prefeences–>PCB Editor–>Editiing Options
- after that it’s possible to move any pad freely (and independend from the footprint) around.