Yes, you can list it on your resume, in the skills section, along with whatever software in which you are proficient. You would simply list "85 WPM", and everyone would know what it means.
Speed without accuracy is not good, so I am assuming this speed is with few errors?
Most administrative positions require a speed between 30 and 45 WPM. Legal Secretaries, and other secretaries, require 60 WPM or more. Police dispatchers require about 45. Something you might want to practice is typing from copy that is on a stand beside the computer. Most tests nowadays have you type directly from copy that is on the screen. Typing with your head turned to the side is a bit more difficult.
Depending on the type of positions you are pursuing, ability to do data entry is also important, measured in keystrokes vs. words. It's not easy to find data entry practice sites. Here is one. http://www.typeonline.co.uk/practicenumbers.php
Congrats on the good speed! Practice from time to time.
Also, remember you need to stay extremely proficient in technology. Falling behind on tech skills is one of the biggest reasons people have difficulty landing jobs.
Best of luck!