Resonance of 4-isopropylbenzenethiol
The missing resonance structure is



If you replace "SH" with "OH" in the 4 structures you've drawn (your 5th structure is the same as the one pictured on the exam) and the one I've drawn, you'll have all of the analogous resonance structures for phenol.

EDIT : response to OP's comment

In my view, it doesn't really matter how you order the structures, but your suggestion (between the 3rd and 4th structures from the left) seems logical.  I've redrawn the figure to show the electron movement.