Hello
Blood pressure is read as systolic/diastolic mm of Hg ie 100/80 mm of Hg in your case.
Normal range for systolic BP is 90-120 mm of Hg and that for diastolic BP is 60-90 mm of Hg. So your BP is within the Normal range
Next Steps
There is a normal diurnal variation in BP
Health Tips
Should get your BP checked once in 3 months with your cardiologist if you are a hypertensive