I know how to adjust the headlights on the blazer, but what I don't know is the measurements. I once saw a diagram where it showed aligning the headlights on level ground on a wall "x" feet away. The goal was to get the head lights "y" height on the wall. Does anyone know what x and y are in this situation?

 

Here's what I found on Google:
Headlights were first aimed at the so-called "10-metre wall
and a following picture:

Found here: https://www.hella.com/hella-tech-wor...ghts-2665.html