Look at the cockeyed front door. Look at the window openings. Look at the ridge line of the 2nd floor over the garage.
The front door was a good clue.
Then came the laser level readings of the first floor from left exterior wall to right:
Then the laser level readings of the 2nd floor from left exterior wall to right:
For more real situations our clients hire us for, go to our website and check out our sample reports: