make him look good, him is used incorrectly. It's better to say himself
Then the statement would be,
Fashion Sense
My younger brother Sergio applied for a job selling retail electronics
at the mall. Good thing I was home on the day of his interview. As he
was walking out the door, I had to stop him. He was wearing a
light-green shirt with orange suspenders. Sergio was supposed to make
himself look good for the interview. Instead, he looked like a circus clown.
I insisted that he change his outfit immediately.