Kinda expensive to buy a sight pusher for a one time sight adjustment. I have one from GlockWorx (?) It was about $150. It is a universal model. To date, I have used it on Glocks, Sigs, Tauri, and a Kimber. It works great.
OR--------you could use a punch and hammer and drift your rear sight in the direction you would like to move your point of impact. I have used this method to change or adjust numerous sights with great success in my pre sight pusher days. The sight pusher is a bit easier, but spendy. Good luck.
Savage