Move them
If your rifle shoots left or right, tap rear sight in the direction you want to change the point of impact.
Rifle shooting to left, tap rear sight to right. Use a brass or plastic bar and a soft hammer. How much to tap? One can calculate the amount by comparing the distance to the target to the distance between front and rear sights. I usually find it easier to give it a big tap 'this' way and then shoot. Usually a small tap or two 'that' way gets it centered.
Sometimes it is easier to move the front sight. Same principle, but move sight opposite direction of desired bullet movement.
Elevation: A higher front sight makes bullet impact lower. Shortening the front sight makes the bullet strike higher. If bullet impact is too low and the front sight is a simple post, a fine file and a single stroke is the beginning place. One can also change the height of the rear sight, again in the direct one wishes to move impact - rear sight up, bullet impact up.
If your front sight has a bead, you would be well advised to check with Brownell's and see if you can find a higher or lower front sight and simply replace it.
Very Important Rule: Rear sight moves bullet strike the same way the sight moves. Front sight moves bullet strike opposite direction of sight movement.
If one has never done it, it seems pretty serious. With a bit of patience and thinking, it isn't as hard as it first seems.