The 24-year-old has listened to his coaches and is using a more open and upright stance.
"Brandon and I did talk a couple of days ago," Bochy said. "He was a little down. We talked about a lot of things, about a hitting approach. Sometimes you have to make adjustments, and that's where he's at."
Belt entered Sunday's game hitting just .231 this season, and he is 6-for-40 in his past 17 games. But Bochy is hoping Belt can turn it around with the help of his new stance.
"I like where he's at right now," the manager said. "[Belt] likes where he's at too, and that's probably more important. When you tweak your stance or your swing, it usually takes a few days to feel really comfortable."