My hubby turned 30 and his blood pressure is now very high. Is it common to have High BP at 30?

his blood pressure was 100/140 whn we first time monitored it but after cutting down salt intake it has stagnated at 90/135/140. He is 5-10 inches tall and weighs approx 73-75 kgs. Doesnt take alcohol , or smoke. Is an army officer so was high on physical activities earlier. But his dad has it..so could he be the target of hypertension too. We dont want to start medicines. He is having a herbal remedy and also doing a bit of yoga and long walks daily. Low salt..wld this help???