Answer:

Explanation:
Given
See attachment for the grid coordinate
From the attachment, we have that:

Required
Determine the coordinates of the second truck
Represent the position with R'
From the question, we understand the position of R' is 6 above R
When a point (a,b) is moved n point above, the new point becomes (a, b + n)
So:

When moved 6 points above becomes:


Hence, (-4,4) answers the question