Jon. BP can fluctuate more than that within a few minutes. Also from arm to arm. It is important to always be either sitting or standing, (consistently), when taking the measurements. BP will be higher if standing baring any anomalies making the reverse true. Wrist cuffs are complete junk and should be avoided like the plague.
Using an arm cuff, I would suggest sitting upright in a comfortable position, place the cuff on either arm, (it's good to experiment to see which one is more reliable/consistent as well as which one is on average higher), locate the brachial artery which is the main artery in the arm located just medial to the top of your elbow joint, then place the pump tube of the unit over this. Tighten the cuff just snug and rest your arm on a solid surface as close to heart level as possible. Next proceed with the test. I am assuming it is an automatic Sphygmomanometer here.
It is helpful to take it at the same time everyday and under the same conditions, (full vs. empty stomach, etc...). Keeping as many variables the same lends itself to getting as accurate a reading as possible as often as possible.
The good news is, your BP is not all that high generally speaking. At your age Statins wouldn't really be needed. Not knowing your history nor being a qualified professional, I couldn't say what would be best for the management for the symptom nor if there is some important underlying cause. In the past I dealt with hypertension and successfully mediated it with a simple diuretic. I believe it was HCTZ (hydrochlorothiazide). After losing some weight and making some other health changes I no longer needed to take the medication.
I hoped that helped and best of luck to you. Be well.
