The Villains snatched a late victory as Christian Benteke struck from the spot against West Brom after Saido Berahino had cancelled out Gabriel Agbonlahor's opener.
And Sherwood - who picked up his first win as Villa boss - celebrated wildly afterwards and thinks the win can fire their safety push.
"I think so (it's a turning point)," he said.
"We have conceded late against Stoke and it is a real body blow, but to score one late is an excellent feeling and I thought it was thoroughly deserved.
"We are improving every game and we are still alive and kicking. It's a massive football club and it is at the wrong end of the table.
"A Tony Pulis side is never dead. It was always likely to be a set piece.
"We kept at it and someone was looking down on us today. I'll try anything, we are at that stage.
"We hadn't won in 12 Premier League games and had to buck that trend. I think we deserved the three points and onwards and upwards.
"When you are at the bottom you have to grind out results, but today we showed by playing them. It was a great improvement.
"I don't think we can do it the old fashioned way with blood and thunder, we have to play through teams."
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