How much should a person be able to bench press to achieve optimal strength and muscle development?

To achieve optimal strength and muscle development, a person should aim to bench press a weight that is challenging but still allows for proper form and technique. This weight will vary depending on the individual's fitness level, but generally, lifting around 70-85 of their one-rep max is recommended for muscle growth and strength gains. It's important to gradually increase the weight over time to continue seeing progress.