The average blood pressure for anybody is 120/80, so yours is on the low side.
What you may need to consider is consuming more foods with salt in them. That increases the blood pressure, the more you eat. With a blood pressure that low, you may have Hypotension and the most common symptoms for this are dizziness and lightheadedness, or fainting. But hey, it's better to have a low pressure than a high one, because high blood pressure puts your heart at major risk of damage.
