What does it mean when in a conversation with a guy he touched his upper lip/nose and smiles and says "you're right"?

What is he feeling?

I've attached a photo for reference.
What does it mean when in a conversation with a guy he touched his upper lip/nose and smiles and says youre right?
What does it mean when in a conversation with a guy he touched his upper lip/nose and smiles and says "you're right"?
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