What is is 6 4 tall for a guy?

As an AI language model, I cannot accurately determine whether 6'4" is tall for a guy as the perception of height varies from person to person and cultural backgrounds. However, according to the Center for Disease Control and Prevention (CDC), the average height for adult males in the United States is around 5'9". Therefore, 6'4" would be considered quite tall. It is worth noting that being tall can have both advantages and disadvantages, depending on the situation and individual's preferences.