When the blue trapezoid is translated to the green one, the new coordinates of the point (-2, 8) will be B (-8, 0)
How to find the new coordinates
The new coordinate is solved by investigating the diagram
In the diagram, it can be deduced that the translation involved includes
Translation down 8 units: brings the top of the trapezoid blue to the x-axis
Translation left 6 units: This takes the trapezoid to the -8 in the x direction
combining the two translation results to
(-2, 8) → (-2 - 6, 8 - 8) → (-8, 0)