The requirements to get into PSG in Mechanical and Robotics and Automation are as follows

• Passed 10+2 examination with Physics and Mathematics as compulsory subjects along with one from Chemistry, Biotechnology, Biology, Technical Vocational subject, Computer Science, Information Technology, Informatics Practices, Agriculture, Engineering Graphics, and Business Studies. 
• Obtained at leaAst 45% marks (40% marks in case of candidates belonging to reserved category) in the above subjects taken together. 
• Passed Diploma (in Engineering and Technology) examination with at least 45% marks (40% marks in case of candidates belonging to reserved category) subject to vacancies in the First Year, in case the vacancies at lateral entry are exhausted.

Coming back to your question, with 95% in DME, you can easily enter PSG in Mechanical and Robotics and Automation.