move the rear sight in the direction you want the bullet to go..right in your case. Shit, I think that's right...If its a snappy 45, quite fighting recoil or get a longer trigger.
Take a step to your right. Fire for effect. Still a bit left? Take another step right. Repeat until stuff lines up. Moving the target left would be cheaten.
In fairness I did warn you guys that it was a dumb question, and I have been shooting my bow lately so that is what had me screwed up, or at least that is what I am going to blame it on......Blake
Move it right, but if you are right handed, check your grip tension and trigger squeeze if the sight looks like it's centered. More likely... it's you.