Hello,

67% is a good score I mean to say is that just because you scored 67% percent you need not repeat 12th std. You can let me know what are you planning to do after 12th in the comment section. And even if you are planning to give it depends upon your college. If your college is strict maybe they will ask for attendance and if not you can sit at home. But still think about your decision and don't worry. All the best to you