Normal is 60 - 100 and generally it slows as we age. The slower your resting heart rate, the more efficient your heart is. An ideal resting heart rate would be around 60 - 70. How are you testing it? The most accurate way to measure a resting heart rate is to measure it along with your BP first thing when you wake up, this is your true resting heart rate baseline. Heart rate is dynamic and changes based on the body's needs or outside stimuli. If you ate within an hour, your heart rate could be higher as it could if you exerted yourself within an hour or two it could still be elevated. Try taking it first thing for a few weeks and track the numbers to determine your average. If you go to the BP Tracker here at Medhelp you can track your heart rate as well.
Hope this helps!
Jon
For women 70-80 is normal. Over 84 is high, but you have it still in the OK reading if it wont go higher. You should check it time to time and if it is higher tell your doctor about it.