You could move the front sight left by screwing the barrel in a tad. Logically, barrels are most likely turned in past 12 O'clock to get them to seat tight enough and and not turned in all the way to 12 O'clock because they got tight before 12 O'clock. If the barrel already is torqued in very tight it might have to be removed and a hair shaved off its shoulder in a lathe. Without a frame wrench the frame is easily bent. Bent frames go to steel recycle. If that's news a gunsmith should be consulted.

As pointed out above, you move a front sight opposite the way you want to move point of impact so turning the barrel in further will move point of impact to the right.