Ryan Harley hit a late penalty to give the Grecians victory and leave the Robins seven points adrift of safety with seven games remaining.
Tisdale said: "I am satisfied with three points and we needed it. We`ve had a couple of losses and the result was everything. We got it and I`m really pleased.
"I didn't see anything of the penalty if I`m honest. I can only trust the referee's decision. I hear it was a handball, but whether it was lucky or deserved, I don't know.
"It was very foggy and it happened a long way away. The referee blew his whistle and that is all that matters.
"It took us some time to find some tenacity with our performance. It takes us past 50 points for the season and past our total for last season, so that is good and progress on last season. Again, it shows the club is making progress."
Source: PA
Source: PA