The percentage of adult height attained by a girl who is x years old can be modeled by f left parenthesis x right parenthesis equals 61 plus 34 log left parenthesis x minus 5 right parenthesis where x represents the girl's age (from 5 to 15) and f(x) represents the percentage of her adult height. According to the model, what percentage of her adult height has a girl attained at age 13? A girl has attained enter your response here% of her adult height by age 13. (Do not round until the final answer. Then round to the nearest tenth as needed.)