Look, it is really unpredictable, because there are many IIMs who do not give much weightage to your Graduation Scores, whereas there are certain IIMs like IIM Bangalore, who give higher weightage and some Bonus Points to students with a Work Experience than Freshers. As far as I understand, your 10th and 12th scores are more or less apt, however your Graduation percentage is on the lower side. IIM C, IIM K, IIM L, IIM Shillong and IIM Indore are few of the Old IIMs giving lower weightage to past academics. However, only way to make up for it is getting a good CAT Percentile atleast above 99, and stand a chance of securing a seat in one of the IIMs. For more information do follow the link below

https://bschool.careers360.com/articles/iim-admission-criteria