A student's course grade is based on one midterm that counts as 10% of his final grade, one class project that counts as 20% of his final grade, a set of homework assignments that counts as 30% of his final grade, and a final exam that counts as 40% of his final grade. His midterm score is 83, his project score is 93, his homework score is 77, and his final exam score is 68. What is his overall final score? His overall final score is (Round to one decimal place as needed.)