Can someone please explain to me this Co-ordinate Geometry question. This is from GRE Foundation assessment Test.

If every point on the line with the equation y = -4x + 12 were to be shifted vertically up a distance of 8, then, relative to the original x-intercept, the new x-intercept would shift:

a distance of 2 to the left

a distance of 2 to the right

a distance of 4 to the left

a distance of 4 to the right

a distance of 8 to the left

a distance of 8 to the right

Answer: a distance of 2 to the right