Question: How do we receive the record on Judgment Day? On Judgment day the lost people are given the Record (of their bad deeds): Behind their back [84:10], or in their left hand [69:25].
Answer: Simple, the people with good deeds will extend their right hand to recieve their record. People with bad deeds would hide their left hands behind their backs and they will have to take it in this position. Or equally understandable if they take it with their left hands they will hide their left hands behind thier backs.
84:7 Then he who is given his Record in his right hand, فَأَمَّا مَنْ أُوتِيَ كِتَابَهُ بِيَمِينِهِ
84:8 Soon will his account be taken by an easy reckoning, فَسَوْفَ يُحَاسَبُ حِسَابًا يَسِيرًا
84:9 And he will turn to his people, rejoicing! وَيَنقَلِبُ إِلَى أَهْلِهِ مَسْرُورًا
84:10 But he who is given his Record behind his back,- وَأَمَّا مَنْ أُوتِيَ كِتَابَهُ وَرَاء ظَهْرِهِ
84:11 Soon will he cry for perdition, فَسَوْفَ يَدْعُو ثُبُورًا
84:12 And he will enter a Blazing Fire. وَيَصْلَى سَعِيرًا
69:25 And he that will be given his Record in his left hand, will say: "Ah! Would that my Record had not been given to me! وَأَمَّا مَنْ أُوتِيَ كِتَابَهُ بِشِمَالِهِ فَيَقُولُ يَا لَيْتَنِي لَمْ أُوتَ كِتَابِيهْ
From Hadith, in Sahih Al-Bukhari, in the chapter of "Tafseer Al-Qur'an," regarding Al-Inshiqaq(84):10: "But whosoever is given his book in his left hand.." Al-Bukhari narrates that Mujahid explained "..in his left behind his back".