Less than 60% in engineering sems, will it affect my future?

hey ! i am doing my engineering in ece and am in 4th sem. my 10th and 12th percentage is around 62 (first class) but now am my unable to fetch even 60% !
am very scared about my future, i really want to become a successful engineer .
all the past three sem i got only about 55%. will this affect my placement in future ?
please give me some study tips and advise as what to do, so that in coming semesters i really want to boost my percentage and have a good aggregate !! and what extra courses if i do will be beneficial .. kindly help !

There are still 4 more sems to go and let me tell you, 60% is kind of need. Study really hard and achieve it. If you don't, the very first effect will be getting disbarred from campus recruitment. Its really tough to get job when you're in the outside world. You've time so try to make up for it and you should be good.