Is 95 a good resting heart rate for a 12 year old?

Such isolated values have very limited use in trying to interpret as circumstances in which they were taken as well as goals of how to use such numbers have to be clearly specified. It is likely that by itself his/her heart rate was normal, but abnormalities cannot be ruled out. His or her pediatrician would be your best resource if you have reason to believe that something is abnormal.

This depends on many things. What is the room temperature? Exercise status? BMI? I would go to CDC and lookup what is the normal resting heart rate for 12 year olds like him in Ponce. Find When you take pulse by counting at the wrist or listening to the heart do it for 60 seconds, Will be different and related to drinking caffeine, taking some cold meds, anxiety. Better yet ask a local Dr.