107/79 is normal blood pressure. but the pulse rate is not normal. The normal blood pressure is 1200/80. you are having less values in systolic and diastolic pressure. But when it below 90/60 we can say that it is low BP. There is no need to worry. The heart beat can vary because of several reasons. This low BP may be a temporary change. check it another. You can do exercise regularly and use the food items which contains cholesterol, salt etc. To improve the BP and the pulse rate you can drink much more water.