Recommendations for daily protein intake vary widely. Expressed as a proportion of the person's body mass, a general requirement is considered to be 0.8 g per day and kg of body mass, that would be 68 g for you. If you are physically active, this might be more. One study on strength athletes concluded on protein requirements of 1.76 g.kg-1.day-1 for strength athletes, against 0.89 g.kg-1.day-1 for sedentary subjects. On the other hand (according to this study for instance) endurance sport does not raise protein requirements significantly, so 1 g.kg-1.day-1 would be enough for endurance athletes. Also, since endurance sport raises general energy requirements, the protein requirements are actually easier to meet (in terms of percentage of proteins in energy intake).