Muller scored the first goal of the evening as the Germans subjected Brazil to the biggest defeat in their history.
The Bayern Munich forward has admitted that it was a special result, but his teammates are now fully focused on the final this weekend.
"It's an indescribable feeling," Muller FIFA.com. "We got off to a great start and when you're 5-0 up at half-time against Brazil in Brazil then you know it's something special.
"Nobody was expecting that to happen. We hoped we'd get one or two chances because Brazil's main strength is in attack. We need to let this all sink in now and then shift our focus to the Final. We want to win the trophy and we're going to give everything to make that happen."
Germany will be attempting to win the World Cup for a fourth time when they take on Argentina at the Maracana on Sunday.