Okay, I laughed for a minute at that pic and KeNo's response.
Anyway, to the OP: Your prof's behavior is infuriating. Unfortunately, my cousin is a college professor (and a pretty young, cool one) and even he gets turned off when a student emails him asking to re-evaluate a grade. What's worse, the rest of the department is usually on the prof's side, and thinks of the student protester as a whiny brat.
I completely disagree with the above poster who said to shrug it off. Take it from me (I already have a second graduate degree) when I tell you that your undergrad GPA can be ridiculously welded to you--depending on your industry or field, it can follow you around for ten years after graduating. And you did A- work; that's what you deserve.
Email (as KeNo pointed out--always leave a paper trail) the professor back when he/she responds and say something like, "thanks for taking a second look at this for mne. I understand you're busy with the end of semester, and I appreciate you taking the time." You need to let him know this because it makes professors more amenable, according to my cuz.