Considering that it's 14 over, I doubt that the "deal of the day" that some courts do for those that just show up will completely wipe it off the record. Even if the court does offer it, it will usually simply be changing the citation to something that offers less points but still offers the same fine. Example, more than 10 years ago, I was pulled over for doing 16 over. The "deal of the day" in my case was to reduce my 4-point 16 over ticket to a 2-point defective speedometer, but the fine remained unchanged.
As for actually fighting it, the only circumstance that MAY be considered is the fact that it was a rental he was driving. Even then, it's likely that the most that would be done is to reduce the ticket to a defective speedometer. That would require a testing of the speedometer, not an easy task with a rental.
I don't care about the money. It's the points and the moving violation. If they offer him defective speedometer, he'll take it.
BTW, the fine is only $75. What's up with that? Most fines for speeding I know of are $160+.