"Normal" is 120/80, but it's actually good to be below that. 108/70 is just fine.
I think the biggest thing is knowing what is "normal" for you. I have blood pressure around what yours is which is lower than "normal" but I know that so I would probably be concerned if it was closer to average.
the same thing with my body temp too. I usually run a low temp so when I have a temp of 99.something that is a fever for me.
Know your normal stats, but i'm sure you're fine.