Really, you'd benefit from drawing this situation. Plot (1,2). Notice that y=2 here. If x remains the same, y moves from 3 units above the horiz. line y = -1 to 3 units below y = -1, and so we have the new point (1,-4).
Now reflect the pt. (1,-4) about y=1. Notice that -4 is 5 units beneath y = 1. So add 5 units to y=1, obtaining y= 6. The new point is (1,6).
