How do I go about adjusting the windage on my SKS? Its shooting about 6 inches to the right.

You'll have to buy a tool made for adjusting the front sight, look in a shotgun news, gun list, alot of vendors have them for sale, they fit over the front sight,and push it left/right, they don't cost much,($ 10.00 or less) can also be had at gunshows,you probably won't have to move it much, Remember, on front sight adjustments are opposite of rear sight adjustments,(like on a commericaly made rifle) so, to move poi to the right, you move the front sight to the left,Reason being, when you shoulder the rifle, and look down the sights you will slightly twist it to get the sights to line up, move the front sight to the left and you will twist the rifle to the right to line up the sights.... and get your needed right windage adjustment.