The distance between any two points can be found using the Pythagorean Theroem...
d^2=(x2-x1)^2+(y2-y1)^2 in this case
d^2=(2-2)^2+(1--6)^2
d^2=0+49
Since d>0
d=7 units
He should move to negative 16 to the right side and not adding 16
Sin (x) = -13/15
Hope this is correct