Monitoring my heart rate. If I am relaxing from mid 50's to 60's. If I am up walking around 70-80's. 50 years old. Do cardio 6 times a week. Normal?

Normal for you. Congratulations on working out so consistently. It appears to be paying off. Your resting heart rate (hr) can be an indication of cardio fitness. As you become more fit, your heart becomes a more efficient pump and your hr drops. Everybody is different but with activity hr and blood pressure do increase. Want to know more, read about using hr monitors to create exercise goals specific to you.