I copied this from Wikipedia after searching "iron sights".

Detailed instructions for adjusting the sights:
[ul][*]To move the line of sight DOWN (the shot hit BELOW the point of aim) the REAR sight is RAISED or the FRONT sight is LOWERED.[*]To move the line of sight UP (the shot hit ABOVE the point of aim) the REAR sight is LOWERED or the FRONT sight is RAISED. (Example below)[*]To move the line of sight LEFT (the shot hit LEFT of the point of aim) the REAR sight is moved RIGHT, or the FRONT sight is moved LEFT.[*]To move the line of sight RIGHT (the shot hit RIGHT of the point of aim) the REAR sight is moved LEFT, or the FRONT sight is moved RIGHT.[/ul]
I have a high left issue, so I feel your pain. My back sight is bottomed out too so I am going to shim my front sight. Don't know if that is an option for you or not. I want to hit where I aim. I don't want to have to worry about holding high, low, left, or right becuse my gun is not hitting where I want it to. Nice thing is you have options. Adjust sites as much as possible,buy sites with more adjustment than you have now,or buy a scope. Obvioulsy these are listed form cheapest to most expensive.If you have questions about patterning search that here. There is a thorough post on this. Alot depends on howparticular you want to be.I hope things work out the way you want them to.