Brief Answer: Get your blood pressure measured on two other occasions.
Detailed Answer: Thanks for asking on HealthcareMagic.
I have gone carefully through your query and understand your concerns. Your BP is on the higher side. One reading is not enough and you need to get your BP checked on three different situations. If the pressure is raised on multiple occasions you need to get cautious. Restricting total amount of dietary salt would be the first step. If that does not suffice you would need to take regular medication for the same. Please do not ignore it.