JNC-7 recommends 2 or more properly measured, seated blood pressure readings on each of 2 or more office visits to establish the diagnosis of hypertension 
JNC-8 Changes:
In patients ≥60 yr the threshold has increased from <140/90 to <150/90
Patients with diabetes mellitus (any age) and >140/90
In patients ≥60 yr the threshold has increased from <140/90 to <150/90
Patients with diabetes mellitus (any age) and >140/90
Asymptomatic hypertension
Hypertensive emergency
Hypertensive urgency
Stroke
Sympathetic crashing acute pulmonary edema
Eclampsia
Ischemic stroke
Hypertension 