May be something related to child resistant packaging. From the CPSC FAQ on the Poison Prevention Packaging ACT "For a package to be child-resistant, at least 85% of tested children must not be able to open the package during the first 5 minutes of the test".https://www.cpsc.gov/FAQ/PPPA

Ah, the classic sad onion.

I believe it is indicating that the child lock is only 85% effective.

How the hell they arrived at that number we may never know, but I'll bet you it's buried on page 4,987,253 in clause 6, subsection 8 of European Union Product Safety Report 156.421a. Or something.

It means this product was made with 85% child slavery

85% of the child laborers who made this product were unable to escape.

Tintin in jail 85% of the time?

A guess? 85% childproof.

85% baby in every lock

Could be 85% alcohol and to keep locked away from children

That baby icon clearly doesn't like fire very much. Or maybe it's mourning that it only has a 15%, per attempt, at stealing fire from the gods.

Where did you find this? What is the graphic to the left?

I don't think it's related, but there is a brand of sewing/embrodery machines called Baby Lock (as in smaller, home use version of an industrial overlocker sewing machine). Its logo is just the words Baby Lock inside an oval, nothing with babies or locks.